CN101743173A

CN101743173A - Closure for a sealed container of a pourable food product, and method of producing thereof

Info

Publication number: CN101743173A
Application number: CN200880018649A
Authority: CN
Inventors: F·帕里尼洛; F·普西; R·伯格; M·瓦福特
Original assignee: Tetra Laval Holdings and Finance SA
Current assignee: Tetra Laval Holdings and Finance SA
Priority date: 2007-06-05
Filing date: 2008-06-04
Publication date: 2010-06-16
Anticipated expiration: 2028-06-04
Also published as: BRPI0812270A2; TWI400183B; JP5461393B2; KR20100017643A; BRPI0812270B1; MX2009011747A; CN101743173B; EP2000417A1; UA96632C2; WO2008148823A1; RU2009149523A; HK1144679A1; ES2548289T3; JP2010528947A; US20100140208A1; PL2000417T3; EP2000417B1; RU2458833C2; US8910811B2; DK2000417T3

Abstract

There is described a closure (1) for a sealed container of a pourable food product, comprising a pouring spout (2) defining a pour opening (3) externally closed by a cover portion (15), a cap (4) fitted to the pouring spout (3) in a removable way, an opening member (16) interposed between the cap (4) and the cover portion (15) of the pouring spout (2) and joined to the cover portion (15), and driving means (9, 35, 41) carried by the cap (4) to engage and pull the opening member (16) along a direction (A) transversal thereto upon removal of the cap (4) from the pouring spout (2) so as to detach the cover portion (15) from the neck portion (6) and free the pour opening (3) when the closure (1) is first unsealed by the user.

Description

The obturator and the manufacture method thereof that are used for the airtight container of dumpable food article

Technical field

The present invention relates to be used for the obturator of the airtight container of dumpable food article, and the method for making this obturator.

Background technology

As everyone knows, many dumpable food articles, for example fruit juice, milk, tomato juice and beverage, usually be contained in the dissimilar and big or small various containers and sell, for example: the packing of the parallelepiped shape of making based on plastics and/or based on the laminated material or the so-called couch board material of paper by multilayer; The plastic wrapping of beaker shape; Blow molded bottle; Perhaps glass, thin sheet of metal or aluminium vessel.

All these containers all are equipped with obturator, and obturator can be opened, and to allow the customer near food article, so that food article is poured in the drinking vessel, perhaps directly consume food article from container.

The spiral cover obturator generally is used for bottle-shaped vessel, tears mark and often only be provided with by the container that the couch board material is made, and perhaps is provided with the pouring opening that is formed in the container and covers with the pulling tab.

And the known container of making by the couch board material, its fitted around at the opening that forms by packing has the plastic-enclosed device of direct injection-molded to the container, so that complete closed and sealed open.This class obturator limits the pouring opening of container usually, and pouring opening can be equipped with for example spiral cover or press cover.

Certainly the obturator of injection-molded can be all size, and even limit the entire top (as with regard to regard to the known container of registered trade mark (RTM) " Terra Top ") of container, and the top of container has illustrated in patent application EP-A-0965531.

Though allow accurate.Special quality is shaped, and still, for example, when the fruit juice of packing replenishing vitamins, as requested, the injection-molded container top does not allow in the top in conjunction with the vapour barrier layer.

For example, described at patent EP-B-1197438 and patent application WO 03/061940, also knownly produce the plastic top of container by blowing plastic tube-shape preformed member, the plastic tube-shape preformed member can comprise the vapour barrier layer and also have every optical material layer.

As trade mark " Terra Aptiva " and known container is to use an example of the container that this technology (that is: have by the couch board material and make main base section, and the top of the dumpable goods of producing by blowing plastic tube-shape preformed member that are used for pouring liquid or container) produces.

This technology provides the shaping particularity of height, and especially aspect pouring opening, still this technology has the shortcoming that needs to use specialized equipment.

In order to make plastic top or the obturator of waiting to be applied to couch board container of material part, designed recently and a kind ofly comprise thermoforming and injection-molded operation but do not comprise the method for blowing.

An example of this method is described in patent application WO 2005/044538 to some extent, and this method comprises that thermoforming has the step of lamellar body of the laminated plastics material of vapour barrier layer (for example EVOH).This lamellar body is integrally limited by circular base partial sum cylindrical neck portion part, the circular base part finally is assembled on the cardboard base section of container, the cylindrical neck portion part limits pouring opening from the inward flange protrusion of base part and with base part, pours out food article by this pouring opening.Because thermoforming begins to carry out from a slice plastic material, so the neck part is in its side place relative with base part sealing.Have the side screw thread with the outer injection-molded of the plastic material that is spun on the protectiveness on the lid to lamellar body, so that form the dumping mouth mouth of container.

After above operation and before using lid, remove and make pouring opening osed top material.

In order after filing of containers, to realize the hermetic closed of gained dumping mouth mouth, aluminium foil is welded on the top of mouth mouth.After this operation, lid finally is screwed on the dumping mouth mouth.

The above method of the plastic top of cardboard-plastic container that manufacturing is used to make up or obturator mainly has the shortcoming of the material that takies plenty of time, work and waste costliness.

In fact, the part of the material that seals pouring opening and be removed before the application lid after the thermoforming operation is equivalent to raw-material about 15-20% usually, and, in addition, this part has quite high cost, because with different such as polyethylene or polyacrylic common plastics material, this part comprises vapour barrier.

In addition, be welded on the top of dumping mouth mouth and constitute expensive additional components with the aluminium foil of realizing hermetic closed device, its must with lid applications in just making good before the container and being assembled on the mouth mouth.

In addition, the gained obturator requires the user to carry out annoying two steps operation to realize breaking a seal first.In fact, at first must be from the dumping mouth mouth lid of outwarding winding, and tear the aluminium foil that is covered with the mouth mouth then, to arrive content.

Disclosure of the Invention

An object of the present invention is to be provided for the obturator of the airtight container of dumpable food article, this obturator is designed to so that directly and in mode cheaply to eliminate above-mentioned shortcoming.

Another object of the present invention is the obturator that will be provided for the airtight container of dumpable food article, this obturator can be guaranteed the actv. trapping and/or every light, and allow during its production process, to reduce the waste of expensive material, and just realize breaking a seal first in reliable and easy mode by single step operation and the effort that utilizes the user to reduce.

The obturator of the airtight container that is used for dumpable food article that at least one in these purposes can be advocated by claim 1 is realized.

The invention still further relates to manufacturing that claim 23 advocates and be used for the method for obturator of the airtight container of dumpable food article.

The accompanying drawing summary

By example many preferred non-limiting examples of the present invention are described with reference to the accompanying drawings, wherein:

Fig. 1 has shown the vertical section according to obturator of the present invention of the airtight container that is used for dumpable food article;

Fig. 2 has shown the vertical section of Fig. 1 obturator after opening;

Fig. 3 and 4 has shown the vertical section of Fig. 1 obturator in each stage that is in the method according to this invention;

Fig. 5 has shown the vertical section of more high range of details of Fig. 1 obturator in the given stage in the possible variant that is in the method according to this invention;

Fig. 6 has shown the vertical section of Fig. 1 obturator in the given stage in another possible variant that is in the method according to this invention;

Fig. 7 to 11 has shown the corresponding vertical section of the possible variant of Fig. 1 obturator.

Realize optimal mode of the present invention

Label 1 among Fig. 1-4 is indicated the obturator of the container (not shown) that is used for liquid or dumpable food article as a whole, for example is used to the plastic-enclosed device of cardboard-plastic container of making up, below describes and only in the mode of example it is carried out reference.

Obturator 1 has longitudinal axis A, and consist essentially of: dumping mouth mouth 2, it has one deck trapping at least and/or every luminescent material, EVOH for example, and limit pouring opening 3 (pouring out food article from container), and be assembled to the cylindrical cap 4 on the dumping mouth mouth 2 removably by pouring opening 3.

More specifically, dumping mouth mouth 2 comprises: circular base part 5, and in the example shown, base part 5 is recessed to internal tank; And substantially cylindrical tubular neck portions part 6, its inner radial edge 7 from base part 5 is protruded, and limits pouring opening 3 with base part 5.

According to unshowned feasible alternatives, the base part of dumping mouth mouth 2 also can be configured to integrally limit the whole tops or the end wall of container.

Lid 4 manufactures single-piece, and substantially by cylindrical side wall 8 and the dish type roof 11 that is used for covering in use the top of dumping mouth mouth 2 limit, sidewall 8 has negative thread 9, and negative thread 9 has one or more starting points, is arranged on the cooresponding screw thread 10 on the exterior lateral sides of neck part 6 with joint.

In a unshowned alternative, the sidewall 8 of lid 4 can be provided with a plurality of cam-type salients of the cooresponding salient that is suitable on the engage neck part 6 in inside.

In fact, in both cases, lid 4 all can be assembled on the dumping mouth mouth 2 and from dumping mouth mouth 2 along the translational component with the A that parallels to the axis with around the stroke of the rotational component of this axis and remove.

Lid 4 is integrally molded with usual mode and corresponding anti-tamper ring (tamperproof) 12, anti-tamper ring 12 by the connecting device 14 that can rupture (for example annular can rupture bridgeware perhaps multipath to the bridgeware that can rupture) be connected to coaxially on the bottom margin 13 of sidewall 8.

Originally lid 4 is assembled on the dumping mouth mouth 2 on complete closed or leak free position (Fig. 1), wherein lid is screwed on the neck part 6 fully, bottom margin 13 and anti-tamper ring 12 still are connected to each other simultaneously, and lean against on the opposite side of base section of screw thread 10 of annular rib or neck part 6, annular rib is on the neck part, extend than screw thread 10 lower positions with respect to axis A.

In case Kaifeng, lid 4 just can be at open positions (Fig. 2) and mobile between the detent position once more, on open position, lid 4 screws off from dumping mouth mouth 2, and on detent position once more, lid 4 is spun on the dumping mouth mouth fully, so that reseal pouring opening 3.

As describe in more detail below, dumping mouth mouth 2 is made and is attached on the container with osed top structure, wherein with 6 one-tenths single-piece dish types of neck part enclosure portion 15 neck part 6 with seal pouring opening 3 towards a side of container on the relative side in use; When lid 4 was removed by dumping mouth mouth 2 first, promptly when initial container was broken a seal by the user, enclosure portion 15 was just separated from neck part 6 owing to moving of lid 4, thereby discharges pouring opening 3.

Advantageously, carry out this effect of lid 4 on enclosure portion 15 by dish type opening feature 16, dish type opening feature 16 for example is connected on the enclosure portion 15 by welding, and during removing lid 4 from dumping mouth mouth 2, the top part of the screw thread 9 by lid 4 or other suitable drive mechanism engage and pulling dish type opening feature 16 along axis A.

Especially, opening feature 16 places between the roof 11 and enclosure portion 15 of lid 4 on being attached to enclosure portion 15 time, and with lid 4 without any rotarying connection.

Opening feature 16 has the outward flange 17 radially outstanding with respect to the top surface of dumping mouth mouth 2, so as at lid 4 when neck part 6 is outwarded winding, by top part (being vicinity this outer peripheral part of the screw thread 9) joint of screw thread 9; Outward flange 17 is circular, and towards 6 bendings of neck part, so that on its top 18, extend.

As particularly in Fig. 2 and 3, can being clear that, the roof 11 of lid 4, the top partial sum of screw thread 9 be limited in lid therebetween sidewall 8 define the maintenance seat 20 that is used for opening feature 16, not inadvertently break away from lid to prevent opening feature 16.

The given shape of the outward flange 17 of opening feature 16 is convenient to engage and insert with actuating device in the maintenance seat 20 of lid 4.

Especially, opening feature 16 remains on seat 20 inside of lid 4, and have given action radius (play) along radial and axial direction,, and substantially between the top part of the roof 11 of lid and screw thread 9, move along this axis so that freely rotate around axis A.

Shown in Fig. 1,2 and 4, opening feature 16 has: first circular ridge 21, opening feature 16 are welded on the enclosure portion 15 of dumping mouth mouth 2 along first circular ridge 21; And second circular ridge 22, it extends between circular ridge 21 and outward flange 17, and define contact portion, this contact portion is in the complete closed of lid 4 and cooperate with the top 18 of neck part 6 on the detent position once more, even so that guarantee that obturator 1 reseals after initial container Kaifeng.

Make obturator 1 according to the method for the following stated.

At first, comprise trapping and/or on the multilayer sheet of optical material layer (for example EVOH), carrying out shaping operation, be preferably the operation of thermoforming or heat processing and forming.

Shaping operation produce hollow, be the main body 25 of hat substantially, main body 25 is opened on a side of the container that agent-oriention 25 finally is attached to it, and is osed top on opposite side.

More specifically, main body 25 comprises the circular bottom part part that integrally limits base part 5, and the cup-shaped top section 26 of rounding post that protrudes vertically from the inner radial edge of base section.Top section 26 has the sidewall that limits the inboard of neck part 6 and therefore laterally determine pouring opening 3 boundaries, and the dish type roof of sealing pouring opening 3.

Perhaps, can make main body 25 by other suitable forming technique, for example compression molded or injection-molded.

Main body 25 also can be by not having trapping and/or every the plastic material manufacturing of light characteristic, and can provide trapping and/or every optical material layer by finish coat.

Next, plastic material (for example polyethylene or polypropylene) by compression drape molding (overmould) to the outside of the top section 26 of main body 25, to form screw thread 10 and other neck feature, so that give thickness sufficient and rigidity to those parts.

All these operations all allow to obtain to be in the dumping mouth mouth 2 of structure shown in Figure 3.

When having realized the formation of dumping mouth mouth 2 by compression or injection-molded, the drape molding step is just dispensable; In fact, compression or injection-molded allow to form main body 25 and all neck feature with single step, and for example screw thread 10.

Because the operation described, neck part 6 and enclosure portion 15 define the global facility of dumping mouth mouth 2, because they only derive from shaping operation, and do not need by welding or gluingly connect them.

Simultaneously, lid 4 and opening feature 16 form by known technology especially, fit together then.Especially, opening feature 16 is pressed in the maintenance seat 20 of lid 4, and is held in place by screw thread 9.

Thus, the component application that will be limited by lid 4 and opening feature 16 is in dumping mouth mouth 2 (Fig. 4), thereby make

screw thread

9 and 10 be bonded with each other, and the roof 11 of lid 4 is pressed against opening feature 16 on the top surface of dumping mouth mouth 2 in

circular ridge

21 and 22 places.

After this further assembly operation, opening feature 16 is welded (for example heat seal) on the enclosure portion 15 of dumping mouth mouth 2 at convex ridge 21 places.

In order during the Kaifeng first of obturator 1, to be convenient to separate enclosure portion 15, also made reduction circumferential line 27 along the periphery of enclosure portion from neck part 6.

Preferably (Fig. 4), line of weakness 27 is implemented as indentation, promptly enclosure portion 15, towards pouring opening 3 or deviate from the partial cut-out of making on the side 27a of roof 11 of lid 4 in the mode of equivalence.For example can or carry out indentation by super sonic or laser equipment and operate by heat or cryoprobe sheet.

In example shown in Figure 4, the formation of welding operation and line of weakness 27 is carried out simultaneously by ultrasonic equipment 28; Ultrasonic equipment 28 comprises substantially: substantially cylindrical tubular pressure parts 29, and it has the annular working surface 30 of cooperating with the roof and the super sonic generating unit (not shown) of main body 25; Backing (backing) parts 31, it is cooperated with the roof 11 of lid 4 on a side relative with press member 29; And the guidance device (not shown), it is used to make press member 29 to move and make press member 29 move away backing parts 31 towards backing parts 31, to obtain the compressive force of expectation between the emergence period at super sonic.

The neighboring of compression member 29 can be equipped with cutting part 32, and cutting part 32 acts on enclosure portion 15, to produce line of weakness 27.

It is to be noted that dumping mouth mouth 2, lid 4 and opening feature 16 can be made from a variety of materials.

According to feasible alternatives shown in Figure 5, for example by using super sonic or laser equipment, hot tool etc. in the stage of heat, to carry out the reduction operation, and pass through the periphery of enclosure portion 15 fully, feasible is the complete cut 23 that not only obtains material below opening feature 16, and obtains the weld seam 24 of the top surface of enclosure portion 15 to opening feature around cutting area.In practice, because the fusing effect of the material around the cutting area, the reduction operation connects when can produce the crossover part in this district.

When aforesaid operations finished, enclosure portion 15 limited the trapping of lids 4 and/or every optical material layer, i.e. " lining ", as this layer alleged usually in the packing of dumpable food article.

According to another feasible alternatives shown in Figure 6, line of weakness 27 can be embodied as when the use of enclosure portion 15 indentation of making on the side 27b of the roof 11 of lid 4.

In this case, for example can be by using circular ridge 33 or waiting to push blade in the still soft material on the side 27b of enclosure portion 15, in the mould, and the opposite flank 27b that acts on enclosure portion goes up the backing parts 34 with the contrast power that produces expectation, the next operation that directly weakens in the drape molding process of screw thread 10 and other neck feature.Therefore, only welding operation must be carried out after dumping mouth mouth 2 and lid 4 and opening feature 16 are fitted together.

Perhaps, also can in the bench board that separates, after the drape molding operation, carry out the reduction operation.

In any case, must before dumping mouth mouth and opening feature 16 and lid 4 are fitted together, carry out reduction operation to dumping mouth mouth 2.

According to the feasible alternatives of unshowned another kind, the reduction operation also can be carried out by produce corresponding line of weakness on two

side

27a, 27b of enclosure portion 15.

According to unshowned another other feasible alternatives, opening feature 16 can be used and be welded on the enclosure portion 15 of dumping mouth mouth 2, and then, lid 4 can be assembled on the assembly that is limited by dumping mouth mouth 2 and opening feature.

This alternatives is applicable to arbitrary side of the enclosure portion 15 that the reduction operation is carried out thereon.

Realize the Kaifeng first of container with single step by the lid 4 of outwarding winding from dumping mouth mouth 2.

When lid among Fig. 14 rotated counterclockwise around axis A,

coupling screw thread

9 and 10 made lid 4 move away from dumping mouth mouth 2 vertically simultaneously, so that make connecting device 14 fractures; Because this action, anti-tamper ring 12 keeps putting vertically on the base section of the screw thread 10 that leans against neck part 6.

In this stage, still be held against the top surface that this opening feature 16 is welded to the enclosure portion 15 on it without any the opening feature 16 of rotarying connection with lid 4.

Therefore be further rotated and after axis A translation at lid 4, the outward flange 17 of the top partial engagement opening feature 16 of screw thread 9, and after lid further rotates, on opening feature 16, produce vertical power, upwards to spur opening feature 16 along axis A; At this moment, opening feature 16 moves with lid 4 along axis A, thereby produces the fracture action at line of weakness 27 places, separates enclosure portion 15 with the neck part 6 from dumping mouth mouth 2, and discharges pouring opening 3.In practice, with the opening feature 16 of motion of translation driving completely, lid has rotation-motion of translation to lid 4 simultaneously along axis A.

When lid 4 removed from dumping mouth mouth 2 fully, opening feature 16 and enclosure portion 15 were kept in present 20, so that can not inadvertently not break away from lid with the state that floats by screw thread 9.

By weld seam, and be dropped on the contrary, enclosure portion 15 keeps being bound up on the opening feature 16.

Only by just lid 4 being assembled back on the dumping mouth mouth 2 closed container once more.In this state, on detent position once more, be applied under the pressure on the dumping mouth mouth 2 by lid 4, the top 18 of neck part 6 has been guaranteed resealing of obturator 1 with cooperating of convex ridge 22.

The modification of Fig. 7 relates to not isostructure lid 4, that be used for engaging and spurring along axis A the actuating device of opening feature 16.

In this case, actuating device comprises annular projection 35, and annular projection 35 extends from the inside face of sidewall 8, and shown in example in be positioned at the height place higher along axis A than the top part of screw thread 9.Projection 35 also can be by separate around axis A and form about the different elements that this axis is positioned at identical or different height place angledly.

Actuating device also can by type shown in Figure 7 but the projection of not extending along whole periphery and the top part of screw thread 9 around axis A limit, this projection and top part are all cooperated with the outward flange 17 of opening feature 16, with during the rotation-motion of translation of lid 4, upwards spur opening feature 16 along axis A.

Fig. 8 relates to different solutions with 9 modification, this solution is in order to first after dumping mouth mouth 2 removes lid 4, guarantee when container seals once more opening feature 16 in seat 20 inside of lid centering correctly, and guarantee that therefore opening feature 16 is with respect to dumping mouth mouth centering correctly.By keeping centering to guarantee correctly to reseal obturator 1.

In the embodiment of Fig. 8, opening feature 16 has thin outstanding extension 36 along its neighboring, outstanding extension 36 is cooperated with the inside face of the sidewall 8 of lid 4, and the inside that stays open parts present 20 with help is placed in the middle, and can not damage the assembling of these parts and lid 4.

In the embodiment of Fig. 9, the roof 11 of opening feature 16 and lid 4 has projection 37 and the additional recess 38 that is bonded with each other respectively, with about its complete closed and once more the lid on the detent position limit the centering position of opening feature.Each projection 37 and additional recess 38 also can have towards the structure of the inside convergent of roof 11, be screwed into the final stage of screwing motion on the dumping mouth mouth 2 at lid during, are convenient to being bonded with each other of projection 37 and additional recess 38.

Be apparent that projection 37 also can be arranged on the roof 11 of lid 4, and additional recess 38 can be arranged on the opening feature 16.

The modification of Figure 10 relates to the different solutions of dumping mouth mouth 2, and the top 18 of dumping mouth mouth 2 has the circular ring-shaped convex ridge 40 that can produce positive sensation during direct consumable products from container to user's mouth.

In this case, owing to have circular convex ridge 40, so the structure of opening feature 16 is made amendment; Especially, when comparing with above-mentioned solution, the convex ridge 21 of opening feature 16 has higher height, so that be welded on the enclosure portion 15, and define annual seat 39 with outward flange 17, annual seat 39 has the U-shaped district, so that receive the circular edge 40 of dumping mouth mouth 2 in the mode with given action radius.

The cooperation of the convex ridge 22 by opening feature 16 and the circular convex ridge 40 of dumping mouth mouth 2 realizes resealing.

According to unshowned another possible variant, also can realize resealing of obturator 1 by the shape that seat 39 accurately is configured with the shape complementarity of the circular edge 40 of dumping mouth mouth 2; In this case, convex ridge 22 may be optional.In addition, this layout can assist in ensuring that also opening feature 16 is with respect to dumping mouth mouth 2 centering correctly.

In the modification of Figure 11, the prominent lip 41 of lid 4 is guaranteed resealing obturator 1 after the Kaifeng first, and it also defines in order to engage and to spur the actuating device of opening feature 16 along axis A remove lid 4 first from dumping mouth mouth 2 during.

Especially, in this case, opening feature 16 is only carried out following function: receive the vertical power from lid 4 during the Kaifeng first of obturator 1, and this power is passed to enclosure portion 15, separate enclosure portion 15 with the remainder from dumping mouth mouth 2.

More specifically, in order to carry out the function that reseals obturator 1 and in the upwards pulling motion of opening feature 16, drive this opening feature 16, the roof 11 of lid 4 has rounding post cup-shaped conformation, wherein open end edge 42 is with 43 externally to be connected on the sidewall 8 by circle, and is provided with prominent lip 41 in inside.

In more detail, the roof 11 of lid 4 integrally comprises: dish-shaped main portion 44, and it has than the bigger diameter of pouring opening 3 diameters, and is being higher than the height place extension of circle with 43 with respect to axis A; And the lateral cylindrical shape part 45 that connects main portion 44, it has circle and is with 43, and is defining end edge 42 with circle with 43 intersection.

Prominent lip 41 extends towards the top surface and the axis A of dumping mouth mouth 2 respectively from end edge 42, so that radially stretch out from lateral cylindrical shape part 45.

When lid 4 was screwed on the dumping mouth mouth 2 fully, prominent lip 41 was pressed against on the top 17 of neck part 6, to guarantee to reseal obturator 1.

In this case, opening feature 16 has towards what lateral cylindrical shape part 45 and main portion 44 protruded and removes addendum cone shape outward flange 46, so that engaged and spurred by prominent lip 41 during the Kaifeng first of obturator 1.

Joint between prominent lip 41 and the outward flange 46 is also guaranteed the correct centering of opening feature 16 with respect to lid 4.

According to aforementioned description, the advantage of the method for obturator 1 and manufacturing obturator 1 will be apparent.

Because the sealing of toppling over side of dumping mouth mouth 2 limits this fact by enclosure portion 15 (it is only by being used to make the shaping operation acquisition of mouth mouth), eliminated any waste of material, particularly have trapping and/or every luminescent material when this material, and therefore very expensive the time.In fact, in this case, enclosure portion 15 only is welded on the opening feature 16, so that during the Kaifeng first of container, separate then from the mouth mouth, rather than when the forming process of dumping mouth mouth finishes, remove first, and then by being welded on the mouth mouth and other parts replacement that when using first, need remove once more.

In addition, owing to the opening feature 16 that has used on the enclosure portion 15 that is welded to dumping mouth mouth 2, the user can be by single step operation and with the less Kaifeng first of striving for obturator 1.

In fact, during lid 4 rotations, opening feature 6 is driven by the lid that carries out pure flat shifting movement along axis A, thereby separates enclosure portion 15 by the tensile stress generation simultaneously on neck part 6.

The applicant notices, when comparing with the shearing stress on whole profiles of material to be removed, this stress on the enclosure portion of dumping mouth mouth allows the user with the littler Kaifeng first of striving for container.In the mode of complete equivalence, come open container first in order to allow the user by acceptable open torque, when comparing, use tensile stress the influence that reduces to be arranged for demand to the reduction breakdown zone with shearing stress.

In fact, applicant's assessment, in a kind of situation in back, the material (promptly connecting two parts that will separate subsequently) that the abundant reduction of breakdown zone requires to be retained in the otch is thinned to more than one percent millimeters, and precision is a few millesimal millimeters.This is very difficult to realize in practice.

In situation of the present invention, applicant assessment has reduced about order of magnitude to the demand of reduction breakdown zone.

In addition, by at the differing heights place actuating device (for example the top part of screw thread 9 and/or one or more projection 35) being arranged on the lid 4 along axis A, so that begin to engage with the outward flange 17 of opening feature 16 at a specified point place, and when lid rotates, increase bonding area gradually, can further reduce demand reduction.In fact, in this case, the desired torsional forces of user all is arranged in along the torsional forces of the situation at the equal height place of axis A less than actuating device.

And, because opening feature 16 and lid 4 are without any rotarying connection this fact, before beginning to make enclosure portion 15 fractures, the angle of scalable lid rotation is for example so that this anglec of rotation is linked to the required anglec of rotation of connecting device 14 fractures on the lid greater than making with anti-tamper ring 12.This can realize by the value along the action radius of the direction of axis A between the received block 20 of setting opening feature 16 and lid 4 rightly.

Obviously, (yet) under the situation that does not depart from appended claims institute restricted portion, can change obturator 1 and method described herein and explanation.

Claims

1. obturator (1) that is used for the airtight container of dumpable food article, described obturator (1) comprising:

-dumping mouth mouth (2), described dumping mouth mouth (2) has in order to limiting the neck part (6) of pouring opening (3), and described neck part (6), with the enclosure portion (15) of sealing described pouring opening (3) towards a side of described container on the relative side in use; And

-lid (4), described lid (4) can be assembled to described dumping mouth mouth (3) and go up and can remove from described dumping mouth mouth (3);

It is characterized in that described obturator (1) further comprises between the enclosure portion (15) that places described lid (4) and described dumping mouth mouth (2) and is attached to opening feature (16) on the described enclosure portion (15); And

-actuating device (9,35,41), described actuating device (9,35,41) carry by described lid (4), with when described dumping mouth mouth (2) removes described lid (4), transversely the axis (A) in described opening feature (16) engages and spurs described opening feature (16), so that when described obturator (1) is broken a seal first by the user, separate described enclosure portion (15) from described neck part (6), and discharge described pouring opening (3).

2. obturator according to claim 1 is characterized in that, described dumping mouth mouth (2) has one deck trapping at least and/or every luminescent material.

3. obturator according to claim 1 and 2 is characterized in that, described lid (4) can remove from described dumping mouth mouth (2) along with the stroke with at least one component that is parallel to described axis (A).

4. obturator according to claim 3, it is characterized in that, described lid (4) has rotational component around described axis (A) with respect to the described stroke of described dumping mouth mouth (2), and, wherein, described lid (4) can freely rotate around described axis (A) with respect to described opening feature (16).

5. according to the described obturator of each claim in the aforementioned claim, it is characterized in that, the enclosure portion (15) of described dumping mouth mouth (2) has weakenings (27) along its neighboring, so that during the Kaifeng first of described obturator (1), on described neck part (6), easily separate described enclosure portion (15).

6. obturator according to claim 5 is characterized in that, described weakenings (27) is included in the side that deviates from described lid (4) (27a) of described enclosure portion (15) and goes up the indentation of making.

7. obturator according to claim 5 is characterized in that, described weakenings (27) is included in the side towards described lid (4) (27b) of described enclosure portion (15) and goes up the indentation of making.

8. obturator according to claim 5 is characterized in that, described weakenings (27) is included in two sides (27a, 27b) indentation of upward making of described enclosure portion (15).

9. obturator according to claim 5, it is characterized in that, described weakenings comprises that fully by the otch (23) of described enclosure portion (15), the welding region (24) between described enclosure portion (15) and the described opening feature (16) extends at described otch (23) on every side.

10. according to the described obturator of each claim in the aforementioned claim, it is characterized in that, the top section (11 of described lid (4), 8) and described actuating device (9,35,41) define the maintenance seat (20) that is used for described opening feature (16), not inadvertently leave described lid (4) to prevent described opening feature (16).

11. obturator according to claim 10 is characterized in that, described opening feature (16) but remain on free rotation mode in the maintenance seat (20) of described lid (4).

12., it is characterized in that described opening feature (16) is contained in maintenance seat (20) inside of described lid (4) according to claim 10 or 11 described obturators, (A) has given action radius along described axis.

13., it is characterized in that described obturator further comprises and is used to keep described opening feature (16) to be centered in maintenance seat (20) the in-to-in aligning gear (36 of described lid (4) according to the described obturator of each claim among the claim 10-12; 37,38).

14. obturator according to claim 13 is characterized in that, described aligning gear comprises projection that is bonded with each other and the recess device (37,38) that is arranged on described lid (4) and the described opening feature (16).

15., it is characterized in that described neck part (6) and described lid (4) have corresponding engage threads (10,9), to limit described stroke according to the described obturator of each claim among the claim 2-14.

16. obturator according to claim 15 is characterized in that, described actuating device comprises the part of the screw thread (9) of the described lid (4) that is close to described opening feature (16).

17., it is characterized in that described actuating device comprises at least one element (35) that extends towards the neck part (6) of described dumping mouth mouth (2) from the sidewall of described lid (4) (8) according to the described obturator of each claim in the aforementioned claim.

18. obturator according to claim 17 is characterized in that, described actuating device comprises many described elements (35) that are positioned at the differing heights place along described axis (A).

19. according to the described obturator of each claim in the aforementioned claim, it is characterized in that, described opening feature (16) has contact portion (22), described contact portion (22) is used for cooperating with the zone (18) of described dumping mouth mouth (2) on every side at described pouring opening (3), even if also to guarantee resealing of described obturator (1) after described obturator (1) breaks a seal first.

20. according to the described obturator of each claim in the aforementioned claim, it is characterized in that, described lid (4) has contact portion (41), described contact portion (41) is used for cooperating with the zone (18) of described dumping mouth mouth (2) on every side at described pouring opening (3), even if also to guarantee resealing of described obturator (1) after described obturator (1) breaks a seal first.

21. obturator according to claim 20, it is characterized in that, the described contact portion (41) of described lid (4) is prominent lip (41), described prominent lip (41) serves as actuating device equally, to engage and to spur described opening feature (16) during removing described lid (4) from described dumping mouth mouth (2) first.

22., it is characterized in that described obturator is configured to integrally limit the complete end wall of described container according to the described obturator of each claim in the aforementioned claim.

23. a method of making the described obturator of each claim (1) in the aforementioned claim said method comprising the steps of:

-form described dumping mouth mouth (2) with the osed top structure, wherein enclosure portion (15) is sealed described pouring opening (3); And

-form removably to be assembled to the described lid (4) on the described dumping mouth mouth (2);

Described method is characterised in that and comprises other step:

-form described opening feature (16); And

-described opening feature (16) is attached on the enclosure portion (15) of described dumping mouth mouth (2), thus make described opening feature (16) place in use between described lid (4) and the described enclosure portion (15).

24. method according to claim 23 is characterized in that, the described step that forms described dumping mouth mouth (2) may further comprise the steps:

-form in use towards a side upper shed of described container and on a relative side osed top main body (25); And

-with the plastic material drape molding on the relative side of the side with determining described pouring opening (3) boundary of described main body (25), to finish described dumping mouth mouth (2).

25. method according to claim 24 is characterized in that, described drape molding step may further comprise the steps: go up in described main body (25) and form screw thread (10), with the screw thread (9) that engages described lid (4).

26. according to claim 24 or 25 described methods, it is characterized in that the described step that forms described main body (25) is to use to be had trapping and/or carry out every the plastic material of photosphere.

27. trapping and/or provide every the finish coat of optical material layer by described main body (25) according to claim 24 or 25 described methods, is provided.

28. according to the described method of each claim among the claim 23-27, it is characterized in that, described method further may further comprise the steps: the periphery along described enclosure portion (15) produces weakenings (27), so that easily separating described enclosure portion (15) during the Kaifeng first of described obturator (1) on described neck part (6).

29. method according to claim 28 is characterized in that, is fabricated to the indentation of described enclosure portion (15) to the described weakenings of major general (27).

30., it is characterized in that the described step of making weakenings (27) goes up in described enclosure portion (15), the side (27a) that deviates from the lid (4) of described pouring opening (3) to be carried out according to claim 28 or 29 described methods.

31. method according to claim 28 is characterized in that, connect and the described step of making weakenings (27) described opening feature (16) is applied to described dumping mouth mouth (2) go up after execution.

32. method according to claim 31 is characterized in that, the described step of connection and manufacturing weakenings (27) is carried out simultaneously.

33. method according to claim 32, it is characterized in that, the described step of making weakenings is to carry out under the state of heat, and the periphery by described enclosure portion (15) fully, so that below described opening feature (16), make complete material cut, and around cutting area, make the weld seam of described enclosure portion (15) to described opening feature (16).

34., it is characterized in that the described step of manufacturing weakenings (27) is upward carried out towards the side (27b) of described lid (4) according to claim 28 or 29 described methods when described enclosure portion (15), use.

35. method according to claim 34 is characterized in that, makes the described step of weakenings (27) and carries out during described drape molding step.

36. method according to claim 34 is characterized in that, makes the described step of weakenings (27) and carries out after described drape molding step.

37., it is characterized in that the described step of making weakenings (27) is to carry out before in the described step that described opening feature (16) is attached on the described enclosure portion (15) according to the described method of each claim among the claim 34-36.

38., it is characterized in that the described step of making weakenings (27) is that (27a 27b) goes up and carries out for two sides in described enclosure portion (15) according to claim 28 or 29 described methods.

39. according to the described method of each claim among the claim 23-38, it is characterized in that, described connection step described lid (4) and described opening feature (16) assemble and be applied to described dumping mouth mouth (2) go up after execution.

40., it is characterized in that described attachment step fits together and is applied to described dumping mouth mouth (2) at described lid (4) and described opening feature (16) and goes up execution before according to the described method of each claim among the claim 23-38.

41., it is characterized in that described connection step is a welding step according to the described method of each claim among the claim 23-40.